Bombable - fixed bug on screen output for G force damage

G force damage message was printing a value 10X too large; fixed.
Sopwith Camel - Updates to historical documents
Sopwith Camel - manual mixture, inverted flight fuel dropout, manual start

Manual mixture: Can select manual mixture option by menu, display of mixture & rpm
Inverted flight: When inverted/negative Gs the engine runs out of fuel & stops; resumes when upright flight/positive Gs return
Manual start: Updated, more realistic engine start routine
Help: Updated help screen to reflect above changes.
Sopwith Camel ver. 1.3 - Major update to lift/drag/propeller thrust data

Camel JSBSim ver. 1.3 release. Major update to make the Camel lift & drag tables closer to wind tunnel data as well as
historical descriptions and measurements of flight characteristics.

 - Uses tweaked version of RAF-14 airfoil wind tunnel data, a close fit to the Camel's wings
 - Tweaked to match known max cruise speed at 6500, 10000, 15000 feet altitude
 - Tweaked to closely match known climb rates at 10,000 feet
 - Tweaked to closely match known turn performance  (this may still need some work)
 - Data files show calculations etc
 - Update to historical notes doc that details performance of a/c in Flightgear and compares to known historical flight characteristics